A. pink
B. colourless
C. red
D. dark blue
Correct Answer:
Option D – dark blue
Explanation
The simplest test for chlorine is a litmus paper test, chlorine will turn a damp blue litmus paper red, and then it’ll bleach it white, there are other tests you can perform.
For example, chlorine will turn damp starch-iodide paper which is white to a blue-black color.
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